my Ford Explorer is hesitating when I accelerate what causes this

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

583 words

Problem Statement

Learn how to diagnose and fix hesitation during acceleration in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems
•Allow the engine to cool before performing any inspections or repairs on the engine components

Symptoms

•Hesitation or stuttering when accelerating
•Rough engine idle
•Increased fuel consumption
•Check engine light illuminated
•Poor throttle response
•Unusual engine noises (e.g., knocking or pinging)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Inspect the air intake system for blockages, leaks, or damaged components
3
Check the fuel system for proper pressure and flow using a fuel pressure gauge
4
Examine the ignition system, including spark plugs and ignition coils, for wear or failure
5
Test the throttle position sensor (TPS) for proper operation with a multimeter
6
Inspect the exhaust system for restrictions, such as a clogged catalytic converter

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Fuel pressure gauge
•Multimeter
•Socket set
•Torque wrench

Parts Required

•Fuel filter (if clogged)
•Spark plugs
•Ignition coils (if faulty)
•Throttle position sensor (if malfunctioning)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs)
2
Inspect the air intake system for blockages, leaks, or damaged components
3
Check the fuel system for proper pressure and flow using a fuel pressure gauge
4
Examine the ignition system, including spark plugs and ignition coils, for wear or failure
5
Test the throttle position sensor (TPS) for proper operation with a multimeter
6
Inspect the exhaust system for restrictions, such as a clogged catalytic converter

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety while working on electrical components.

2. Address Fuel System Issues

Tools Required: Fuel pressure gauge, wrench set.
Sub-steps:
1. Locate the fuel pressure test port on the fuel rail.
2. Attach the fuel pressure gauge to the test port.
3. Turn the ignition key to the "ON" position (do not start the engine) and check the pressure reading; it should be within the manufacturer's specifications (usually between 30-50 PSI).
4. If the pressure is low, check the fuel pump relay and fuse, then inspect the fuel filter for clogs. Replace if necessary.

3. Inspect and Replace Ignition Components

Tools Required: Socket set, torque wrench.
Sub-steps:
1. Remove the engine cover if necessary to access the ignition coils.
2. Disconnect the electrical connectors from the ignition coils.
3. Unbolt the ignition coils and remove them along with the spark plugs.
4. Inspect the spark plugs for wear; replace if they are worn or fouled.
5. Install new spark plugs and torque them to the manufacturer's specifications.
6. Reinstall the ignition coils and reconnect the electrical connectors.

4. Test and Replace Throttle Position Sensor (if necessary)

Tools Required: Multimeter, socket set.
Sub-steps:
1. Locate the throttle position sensor on the throttle body.
2. Disconnect the electrical connector from the TPS.
3. Set the multimeter to measure voltage and connect it to the TPS terminals.
4. Open the throttle manually and observe the voltage change; it should smoothly increase and decrease. If it is erratic or out of specifications, replace the TPS.